Borodulin, V. I. und Ivanov, A. V. und Kachanov, Y. S. und Mischenko, D. A. und Örlü, R. und Hanifi, A. und Hein, Stefan (2019) Experimental and theoretical study of swept-wing boundary-layer instabilities: Unsteady crossflow instability. Physics of Fluids, 31 (064101), Seiten 1-18. American Institute of Physics (AIP). doi: 10.1063/1.5094609. ISSN 1070-6631.
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Offizielle URL: https://doi.org/10.1063/1.5094609
Kurzfassung
Extensive combined experimental and theoretical investigations of the linear evolution of unsteady (in general) Cross-Flow (CF) and threedimensional (3D) Tollmien-Schlichting (TS) instability modes of 3D boundary layers developing on a swept airfoil section have been carried out. CF-instability characteristics are investigated in detail at an angle of attack of −5○ when this kind of instability dominates in the laminarturbulent transition process, while the 3D TS-instability characteristics are studied at an angle of attack of +1.5○ when this kind of instability is predominant in the transition process. All experimental results are deeply processed and compared with results of calculations based on several theoretical approaches. For the first time, very good quantitative agreement of all measured and calculated stability characteristics of swept-wing boundary layers is achieved both for unsteady CF- and 3D TS-instability modes for the case of a boundary layer developing on a real swept airfoil. The first part of the present study (this paper) is devoted to the description of the case of CF-dominated transition, while the TS-dominated case will be described in detail in a subsequent second part of this investigation.
elib-URL des Eintrags: | https://elib.dlr.de/126673/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||
Titel: | Experimental and theoretical study of swept-wing boundary-layer instabilities: Unsteady crossflow instability | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 11 Juni 2019 | ||||||||||||||||||||||||||||||||
Erschienen in: | Physics of Fluids | ||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||
Band: | 31 | ||||||||||||||||||||||||||||||||
DOI: | 10.1063/1.5094609 | ||||||||||||||||||||||||||||||||
Seitenbereich: | Seiten 1-18 | ||||||||||||||||||||||||||||||||
Herausgeber: |
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Verlag: | American Institute of Physics (AIP) | ||||||||||||||||||||||||||||||||
ISSN: | 1070-6631 | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | laminar-turbulent transition, swept wing, hot-wire anemometry, local and nonlocal linear instability analysis, LST, PSE | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Flugzeuge | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | L AR - Aircraft Research | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Flugphysik (alt) | ||||||||||||||||||||||||||||||||
Standort: | Göttingen | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Hochgeschwindigkeitskonfigurationen, GO | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Hein, Dr.-Ing. Stefan | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 13 Jun 2019 10:14 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 20 Jun 2021 15:52 |
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